我正在为我的应用程序编写GLSL着色器。
但是，当着色器尝试链接时，java只会崩溃。
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0facf8f2, pid=92612, tid=93140
#
# JRE version: Java(TM) SE Runtime Environment (7.0_51-b13) (build 1.7.0_51-b13)
# Java VM: Java HotSpot(TM) Client VM (24.51-b03 mixed mode, sharing windows-x86 )
# Problematic frame:
# C [ig7icd32.dll+0x3df8f2]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# D:\Downloads\mcp\ship\Ship\hs_err_pid92612.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
我将D:\Downloads\mcp\ship\Ship\hs_err_pid92612.log的错误日志放在pastebin here中，因为我只想跳转到相关部分：
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j org.lwjgl.opengl.GL20.nglLinkProgram(IJ)V+0
j org.lwjgl.opengl.GL20.glLinkProgram(I)V+15
j utility.ShaderLoader.loadShaderPair(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)I+591
j Joehot200.TerrainDemo.setUpShaders()V+9
j Joehot200.TerrainDemo.startGame()V+43
j StartScreenExperiments.Test2.resartTDemo()V+21
j StartScreenExperiments.Test2.main([Ljava/lang/String;)V+10
v ~StubRoutines::call_stub
查看org.lwjgl.opengl.GL20.glLinkProgram(I)V+15显示错误是连接着色器的OpenGL。
我使用loadShaderPair加载着色器，如下所示：
public static int loadShaderPair(String vertexShaderLocation, String fragmentShaderLocation, String tesShaderLocation, String tesscontrolShaderLocation) {
int shaderProgram = glCreateProgram();
int vertexShader = glCreateShader(GL_VERTEX_SHADER);
int fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
int tesscontrolShader = glCreateShader(GL40.GL_TESS_CONTROL_SHADER);
int tesShader = glCreateShader(GL40.GL_TESS_EVALUATION_SHADER);
StringBuilder vertexShaderSource = new StringBuilder();
StringBuilder fragmentShaderSource = new StringBuilder();
StringBuilder tesShaderSource = new StringBuilder();
StringBuilder tesscontrolShaderSource = new StringBuilder();
BufferedReader tesShaderFileReader = null;
try {
tesShaderFileReader = new BufferedReader(new FileReader(tesShaderLocation));
String line;
while ((line = tesShaderFileReader.readLine()) != null) {
tesShaderSource.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
return -1;
} finally {
if (tesShaderFileReader != null) {
try {
tesShaderFileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
BufferedReader tesscontrolShaderFileReader = null;
try {
tesscontrolShaderFileReader = new BufferedReader(new FileReader(tesscontrolShaderLocation));
String line;
while ((line = tesscontrolShaderFileReader.readLine()) != null) {
tesscontrolShaderSource.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
return -1;
} finally {
if (tesscontrolShaderFileReader != null) {
try {
tesscontrolShaderFileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
BufferedReader vertexShaderFileReader = null;
try {
vertexShaderFileReader = new BufferedReader(new FileReader(vertexShaderLocation));
String line;
while ((line = vertexShaderFileReader.readLine()) != null) {
vertexShaderSource.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
return -1;
} finally {
if (vertexShaderFileReader != null) {
try {
vertexShaderFileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
BufferedReader fragmentShaderFileReader = null;
try {
fragmentShaderFileReader = new BufferedReader(new FileReader(fragmentShaderLocation));
String line;
while ((line = fragmentShaderFileReader.readLine()) != null) {
fragmentShaderSource.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
return -1;
} finally {
if (fragmentShaderFileReader != null) {
try {
fragmentShaderFileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
glShaderSource(vertexShader, vertexShaderSource);
glCompileShader(vertexShader);
if (glGetShaderi(vertexShader, GL_COMPILE_STATUS) == GL_FALSE) {
System.err.println("Vertex shader wasn't able to be compiled correctly. Error log:");
System.err.println(glGetShaderInfoLog(vertexShader, 1024));
return -1;
}
glShaderSource(tesscontrolShader, tesscontrolShaderSource);
glCompileShader(tesscontrolShader);
if (glGetShaderi(tesscontrolShader, GL_COMPILE_STATUS) == GL_FALSE) {
System.err.println("tesscontrol shader wasn't able to be compiled correctly. Error log:");
System.err.println(GL11.glGetString(GL11.glGetError()));
System.err.println(glGetShaderInfoLog(tesscontrolShader, 1024));
}
glShaderSource(fragmentShader, fragmentShaderSource);
glCompileShader(fragmentShader);
if (glGetShaderi(fragmentShader, GL_COMPILE_STATUS) == GL_FALSE) {
System.err.println("Fragment shader wasn't able to be compiled correctly. Error log:");
System.err.println(GL11.glGetString(GL11.glGetError()));
System.err.println(glGetShaderInfoLog(fragmentShader, 1024));
}
glShaderSource(tesShader, tesShaderSource);
glCompileShader(tesShader);
if (glGetShaderi(vertexShader, GL_COMPILE_STATUS) == GL_FALSE) {
System.err.println("Tessellation shader wasn't able to be compiled correctly. Error log:");
System.err.println(glGetShaderInfoLog(tesShader, 1024));
return -1;
}
glAttachShader(shaderProgram, vertexShader);
glAttachShader(shaderProgram, tesShader);
glAttachShader(shaderProgram, tesscontrolShader);
glAttachShader(shaderProgram, fragmentShader);
glLinkProgram(shaderProgram);
if (glGetProgrami(shaderProgram, GL_LINK_STATUS) == GL_FALSE) {
System.err.println("Shader program wasn't linked correctly.");
System.err.println(GL11.glGetString(GL11.glGetError()));
System.err.println(glGetProgramInfoLog(shaderProgram, 1024));
System.exit(1);
return -1;
}
glDeleteShader(vertexShader);
glDeleteShader(fragmentShader);
glDeleteShader(tesShader);
glDeleteShader(tesscontrolShader);
return shaderProgram;
}
这是我的顶点着色器：
#version 400 core
layout (location = 0) in vec3 Position_VS_in;
layout (location = 1) in vec2 TexCoord_VS_in;
layout (location = 2) in vec3 Normal_VS_in;
uniform mat4 gWorld;
out vec3 WorldPos_CS_in;
out vec2 TexCoord_CS_in;
out vec3 Normal_CS_in;
void main()
{
WorldPos_CS_in = (gWorld * vec4(Position_VS_in, 1.0)).xyz;
TexCoord_CS_in = TexCoord_VS_in;
Normal_CS_in = (gWorld * vec4(Normal_VS_in, 0.0)).xyz;
}
这是我的TCS：
#version 400 core
// define the number of CPs in the output patch
layout (vertices = 3) out;
uniform vec3 gEyeWorldPos;
// attributes of the input CPs
in vec3 WorldPos_CS_in[];
in vec2 TexCoord_CS_in[];
in vec3 Normal_CS_in[];
// attributes of the output CPs
out vec3 WorldPos_ES_in[];
out vec2 TexCoord_ES_in[];
out vec3 Normal_ES_in[];
float GetTessLevel(float Distance0, float Distance1)
{
float AvgDistance = (Distance0 + Distance1) / 2.0;
if (AvgDistance <= 2.0) {
return 10.0;
}
else if (AvgDistance <= 5.0) {
return 7.0;
}
else {
return 3.0;
}
}
void main()
{
// Set the control points of the output patch
TexCoord_ES_in[gl_InvocationID] = TexCoord_CS_in[gl_InvocationID];
Normal_ES_in[gl_InvocationID] = Normal_CS_in[gl_InvocationID];
WorldPos_ES_in[gl_InvocationID] = WorldPos_CS_in[gl_InvocationID];
// Calculate the distance from the camera to the three control points
float EyeToVertexDistance0 = distance(gEyeWorldPos, WorldPos_ES_in[0]);
float EyeToVertexDistance1 = distance(gEyeWorldPos, WorldPos_ES_in[1]);
float EyeToVertexDistance2 = distance(gEyeWorldPos, WorldPos_ES_in[2]);
// Calculate the tessellation levels
gl_TessLevelOuter[0] = GetTessLevel(EyeToVertexDistance1, EyeToVertexDistance2);
gl_TessLevelOuter[1] = GetTessLevel(EyeToVertexDistance2, EyeToVertexDistance0);
gl_TessLevelOuter[2] = GetTessLevel(EyeToVertexDistance0, EyeToVertexDistance1);
gl_TessLevelInner[0] = gl_TessLevelOuter[2];
}
这是TES：
#version 400 core
layout(triangles, equal_spacing, ccw) in;
uniform mat4 gVP;
uniform sampler2D gDisplacementMap;
uniform float gDispFactor;
in vec3 WorldPos_ES_in[];
in vec2 TexCoord_ES_in[];
in vec3 Normal_ES_in[];
out vec3 WorldPos_FS_in;
out vec2 TexCoord_FS_in;
out vec3 Normal_FS_in;
vec2 interpolate2D(vec2 v0, vec2 v1, vec2 v2)
{
return vec2(gl_TessCoord.x) * v0 + vec2(gl_TessCoord.y) * v1 + vec2(gl_TessCoord.z) * v2;
}
vec3 interpolate3D(vec3 v0, vec3 v1, vec3 v2)
{
return vec3(gl_TessCoord.x) * v0 + vec3(gl_TessCoord.y) * v1 + vec3(gl_TessCoord.z) * v2;
}
void main()
{
// Interpolate the attributes of the output vertex using the barycentric coordinates
TexCoord_FS_in = interpolate2D(TexCoord_ES_in[0], TexCoord_ES_in[1], TexCoord_ES_in[2]);
Normal_FS_in = interpolate3D(Normal_ES_in[0], Normal_ES_in[1], Normal_ES_in[2]);
Normal_FS_in = normalize(Normal_FS_in);
WorldPos_FS_in = interpolate3D(WorldPos_ES_in[0], WorldPos_ES_in[1], WorldPos_ES_in[2]);
// Displace the vertex along the normal
float Displacement = texture(gDisplacementMap, TexCoord_FS_in.xy).x;
WorldPos_FS_in += Normal_FS_in * Displacement * gDispFactor;
gl_Position = gVP * vec4(WorldPos_FS_in, 1.0);
}
不确定它是否相关，但是当我在顶点着色器中将#version 400 core更改为#version 410 core时，我收到以下错误：
Vertex shader wasn't able to be compiled correctly. Error log:
ERROR: 0:? : '' : Incorrect GLSL version: 410
WARNING: -1:65535: 'GL_ARB_explicit_attrib_location' : extension is not available in current GLSL version
WARNING: -1:65535: 'GL_ARB_explicit_attrib_location' : extension is not available in current GLSL version
WARNING: 0:3: extension GL_ARB_explicit_attrib_location is being used but no proper #version pragrma was used
WARNING: -1:65535: 'GL_ARB_explicit_attrib_location' : extension is not available in current GLSL version
WARNING: -1:65535: 'GL_ARB_explicit_attrib_location' : extension is not available in current GLSL version
WARNING: 0:4: extension GL_ARB_explicit_attrib_location is being used but no proper #version pragrma was used
WARNING: -1:65535: 'GL_ARB_explicit_attrib_location' : extension is not available in current GLSL version
WARNING: -1:65535: 'GL_ARB_explicit_attrib_location' : extension is not available in current GLSL version
WARNING: 0:5: extension GL_ARB_explicit_attrib_location is being used but no proper #version pragrma was used
我无法解决我在使用此代码时出错的问题。因为java崩溃了，除了它发生的代码行之外我没有得到任何其他信息，这使得它很难调试。
那么，如何才能正确加载这些着色器而不会崩溃或“当前GLSL版本中没有扩展”或其他可能出错的地方？
我一直认为这与我的驱动程序只支持OpenGL 4.0有关。那么是否有可能以某种方式修改代码以仅使用OpenGL 4.0方法，或某种方式使用上述4.0方法？ 这是否意味着具有低于4.0的OpenGL的计算机会出现问题？如果一个人的驱动程序仅支持OpenGL 3.2怎么办？我也可以为他们解决这个问题吗？
（基本上我只是希望着色器可以在我的计算机上工作而不会显着改变它们的功能）